Bridge construction.



N0. 708,463. Patented Sept. 2, |902.

' G. M. CHENEY.

BRIDGE CONSTRUCTION. (Applicaziun mea Fei. 24, 1.902.)

/ W/TNESSES: /NVENTOH l Gerge M Cheney TH: Noam: PETERS co, Puoouruo.. wAsmNsbN. o. cA

2 Sheets-Sheet 2.

Patented Sept. 2, i902.

` G. M. CHENEY. smoes consnucnon.

(Application filedy Seb. 24, 1902.)

A TTOHNEYS (No Model.)

/N VENTO/ George M .Cheney W/TNESSE NITE GEORGE `M. CHENEY, OF INDIANAPOLIS, INDIANA.

BRIDGE CONSTRUCTION.

SPECIFICATION forming part of Letters Eatent No. 708,463, datedseptember 2, 1902. Application filed February 24, 1902. Serial No. 95.252. (No model.)

To a/ZZ whom, t may concern: g

Be it known that I, GEORGE M. CHENEY, a citizen of the United States, residing at Indianapolis, in the countyof Marion and State of Indiana,have invented certainnew and useful Improvements in Bridge Construction, ot' which the following is a specification.

My invention relates to an improvement in the structure of and theH means for erecting arch bridges or culvert-s composed partially of cement. i

The object of my invention is to provide a frame which may be first accurately and easily set in any desired position for the production of cement abutments and wing-walls, to provide an improved arrangement of struts for transmitting.,r the stresses from the center of the arch to the abutments, to provide means,

for supporting the necessary false work upon the superstructure, and to provide such im* provements in the details ot' construction as shall be hereinafter pointed out.

The accompanying drawings illustrate my invention. Y

Figure 1 is a perspective view showing the abutment and wing-wall skeletons and the skeleton superstructure supported thereby. Fig. 2 is a transverse section. Fig. 3 is a detail of the false-work support. Fig. 4 is a sectional detail.

In the drawings I have indicated a pair, of opposed abutment frames or skeletons, each of which is composed of a plurality of angleirons or suitable metallic strips 5, which form an open box-like body, and leading from each end of the abutment-frame thus formed is a wing-wall frame which is formed of a series of angle-irons 6. The angle-irons 5 and 6 form an open box or frame into which may be` introduced a cement filling, which when it hardens will incorporate the metallic frame as a portion of the completed abutment and attached wing-walls. The abutmentframe is braced at its middle with a bracingframe 7, and extending from said frame in opposite directions are two brace-rods 8 8,

each of which is secured at its outer end to The.

soon as this is done suitable planking :may be placed along the open sides of this frame and acementlling placed therein, the framework thus becoming incorporated in the structure and forming the marginal lines of the completed abutment and wing-walls.

Resting upon the angle-iron whichforms the upper water corner of each abutment is .a channel-iron 9, Vto the endsot' which are secured suitable end trusses 10. Extending between the centers of the end trusses lO is a beam 1l, preferably latticed, and when the arch is of considerable length intermediate beams 12 12 will extend between the two end trusses l0. In order to distribute the stresses from the center of the arch to the channelirons 9, I spring midway between the two end frames 1() a strut 13, which may be a single bar secured to the beams 1l and l2 or may be made of several pieces, each extending from one beam to another and from each channelsigned for the construction of bridges or arches composed largely of cement, and it has heretofore been the custom to support the false work necessary for the temporary holding of the cement composing the arch by staging supported from the bed of the stream. In my present construction this false work is supported from the superstructure, and in order that the supporting-bolts may be removed without injuring the cement I proceed in the following manner: The false work is composed of a plurality of supporting-plan forms 20, which together form the length of the arch and are adapted to be supported immediately beneath the struts 13 and 14.-, the platforms being divided, preferably along a line adjacent one of the beams ll or 12, the point of division being opposite the beam 11 in the structure indicated in the drawings. Beneath theadjacent ends of the platform 20 I arrange a bar 2l, which is supported by means of a strap 22 and two or more bolts 23,

IOO

the said bolts being supported by a strap 24,

placed across the beam 11. Surrounding each bolt and resting upon the platform is a tube 25, which in internal dimension is slightly greater' than the diameter of the bolt and in length is substantially equal to the thickness of cement or other filling which is to be laid upon the platforms 20. In placing the filling in position the tubes 25 are embedded therein; but as soon as the filling has hardened bolts 23 may be readily withdrawn without disturbing the filling in any manner and the false work thus removed. A similar construction may be used in supporting the temporary sides of the abutment-frames, the sides 26 being held in position by means of bolts 27, which will pass entirely through the frame and be surrounded by tubes 28, which will become embedded in the cement. After the bolts have been withdrawn the tubes may or may not be filled With cement, as desired.

I claim as my inventionl. A combined abutment and wing-walls consisting of a metallic framework approximating the desired form of abutment and attached wing-walls and adapted to contain and be embedded in cement.

2. A combined abutment and wing-Walls consisting of a metallic framework approximating the marginal lines thereof, an intermediate bracing-frame forming part of the abutment-frame, and tie-rods extending from said bracing-frame to the ends of said wingwall frames, the whole adapted to receive and be embedded in cement.

3. In a bridge structure, the combination with the end trusses, of a plurality of beams extending between and connected to the same, and a plurality of struts extending between the several beams parallel with the end trusses and increasing in number from the center of the arch toward each end.

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 17th day of February, A. D. 1902.

GEORGE M. CHENEY.

Witnesses:

ARTHUR M. HOOD, ALBERT F. ZEARING. 

